Emery-wheel dresser



M. G. DOBBINS.

EMERY WHEEL DRESSER. APPLICATION FILED APR. 30. 1920.

1,395,098. Patented Oct. 25, 1921.

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UNITED STATES PATENT OFFICE.

MICHAEL G. DOBIBINS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO FREDERICK I-I. SHAW, OF NARBERTH, PENNSYLVANIA.

EMERY-WHEEL DRESSER.

Application filed April 30, 1920.

- To all whom it may concern:

Be it known that I, MICHAEL G. DOBBINS, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Emery- VVheel Dressers, of which the following is a specification.

The invention relates to abrading ma terials and tools and has for an object tov provide a tool for dressing emery and other forms of abrading wheels and surfaces.

The invention comprehends among other features an emery wheel dresser of simple construction and design and in which the bearings supporting the spindle which can ries the disks or cutters, can be readily renewed when worn, the dresser also including a novel form of protective hood or cover whose combined functions provide for the reduction of the spindle in the bearings and a covering for the cutters arranged to partially inclose the same preventing the flying particles of emery or dust from striking the operator in the face or lodging in the eye.

In the use of emery wheel dressers, it is well known that the usual form of dresser very quickly becomes worn and unfit for further use until it is provided with a new bearing or spindle for the reason that the flying particles of emery or dust, in the operation of the dresser, readily lodge in the bearings and quickly wear and grind them out.

In my improved form of emery wheel dresser, I provide what I term bearing strips, these strips being supported upon a frame or body of the dresser, so that when one of the bearings formed by the strip,

Specification of Letters Patent.

Patented Oct. 25, 1921.

Serial No. 377,879.

Fig. 3 is a horizontal sectional view taken on the line 3-3 in Fig. 1, with some parts in plan, and

Fig. 4: is a vertical transverse sectional view taken on the line 4:-4: in Fig. 1, with the bolt in elevation. v

Referring more particularly to the views, the numeral 10 indicates a body or frame of the dresser, one end of the frame being tted into or formed with a suitable handle 11, with the other end of the frame bifurcated to form a fork 12. The forming of the fork provides side pieces 13, each of which has a depending foot or rest 14, provided for the ready disposal of the dresser in position to dress an emery wheel. The usual cutters 15 are loosely arranged upon a spindle 16 and disposed between the side pieces 13 as shown, the ends of the spindle being lodged in two of the apertures 23.

body 10 and also passes through other open-' ing 23 in the bearing strips 17, this cross bolt 21 also constituting the support for the cover or guard 19 which has cross openings 24 through which the bolt extends, a suitable nut 25 being threaded on the free projecting end of the bolt so that when the nut is tightened up it will secure the bearing strips rigidly to the side pieces and swingingly support the cover as shown.

Now assuming that the spindle 16 is carried in the foremost openings or bearings of the bearing strips and said bearings wear out and become unfit for further use, it will be apparent that. the cover or guard 19, normally lowered, can, after its sides are sprung upwardly to clear the bearing strips 17 be swung up to expose the ends of the spindle, which can now be Withdrawn and the cutters of course removed therefrom. The bolt 21 is then removed from the bearing strips and side pieces and the bearing strips are advanced by sliding them forward on the side pieces in the grooves thereof until the next set of openings or bearings of the strips will be in position to receive the spindle and with but very little practice the bearing strips can be readily adjusted to provide new bearings in place of the worniout bearings of a spindle after the dresser has been in use for some time. This construction coupled withthe arrangement of the cover or protecting hood which retains the spindle against removal from the bearings when the cover is in normal operating position,

presents a construction in emery, wheel dressers which is simple, cannot readily get out of order, will effectively perform its I function and can be cheaply manufactured.

Having described my invention, I claim- An emery wheel dresser comprising a body bifurcated at its forward end and having a transverse aperture in rear of said bifurcation and'alined apertures in the walls of the bifurcation and also having longitudinal grooves in its sides, bearing strips with transverse apertures movably arranged in the said grooves of the body, a spindle removably arranged in said apertures in the walls of the bifurcation and in apertures in the bearing strips, a cutter arranged on said spindle and disposed in thebifurcation, a guard straddling the bearing strips and having side walls arranged at the outer sides of'said strips to hold the spindle against endwise movement, and a 'bolt extending through the body aperture in rear of the bifurcation and also through apertures in the bearing strips and apertures in the side walls of the'guard. V V

In testimony whereof I aflix my signature.

MICHAEL e. DOBBINS. 

